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Question: Someone claims that within a certain neighborhood, the average cost of a house is µ =$100,000 with a standard deviation of σ = $10,000. Suppose that based on n = 16 homes, you find that the average cost of a house is X¯ = $95,000. Assuming normality, what is the probability of getting a sample mean this low or lower if the claims about the mean and standard deviation are true?
in a certain city 46 of the people adults classify themselves as independent 30 classify themselves as liberals and 24
Let S = {c, h, j, q, t, y} be a sample space of an experiment and let E = {c, h}, F = {c, q, y}, and G = {h, j, t} be events of this experiment. (Enter your answers using roster notation. Enter Ø for the empty set.)
The number of lightning strikes in a year at the top of a particular mountain has a Poisson distribution with a mean of 4.2. Find the probability that in a randomly selected year, the number of lightning strikes is 0.
members of the general adult population volunteer an average of 4.2 hours per week. a random sample of 20 female
Give an example of a null and alternative hypotheses. This can be a personal item or something at work. Additionally, identify the Type I and Type II Errors that could occur with your decision-making process.
State the appropriate null and alternative hypotheses. How many different populations are being considered in this analysis? State the appropriate null and alternative hypotheses.
In your words, demonstrate your understanding on the following concepts:
a hot dog vendor provides onions relish mustard ketchup dijon ketchup and hot peppers for your hot dog. how many
Assuming that the difference of each pair is coming from an approximately normal distribu- tion, test if there is any difference in the individuals' driving ability under the two conditions. Use α = 0.05.
The final score in a statistics course follows a normal distribution with mean 68 and standard deviation 12. What proportion of students in the course would pass if they need at least 50 to pass in the course
Assume we know the length of time a battery will hold a charge is a normal distribution with a mean of 50 hours and a standard deviation of 15 hours.
Percentage points in either direction from what would have been obtained by interviewing all voters in the United States." Find the sample size suggested by this statement.
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